US PATENT SUBCLASS 164 / 511
.~ High frequency vibration means

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

250.1  DF  MEANS TO DIRECTLY APPLY ELECTRICAL OR WAVE ENERGY TO WORK {6}
511.~ High frequency vibration means

DEFINITION

Classification: 164/511

High frequency vibration means:

(under subclass 250.1) Apparatus wherein the energy quantity applied to the work material is of the sonic or supersonic vibration type.